Spring hammer



Feb. 26, 1924. 1,484,845

- J. H. PHILLIPS l SPRING HAMMER Filed Aug. l, 1918 2 Sheets-Sheet 2.Hillll l Wim@ x mun f www Patented Feb. 26, 1924.

JOHN H. PHILLIPS, F CHICAGO, ILLINOIS.

SPRING HAMMER.

Application filed August 1, 1918.

To all whom it may concern Be it known that I, JoHN'H. PHILLIPS, acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Spring Hammers, of which the following is a description.

My invention belongs to that general class of devices known as hammers,and relates particularly toV a portable hammer of the type which aremechanicall operated. The invention has among its objects the productionof a device'of the kind described that is simple, eiiicient, compact,durable, con

venient, adjustable and satisfactory for use wherever found applicable.It has particularljT as an object the production of a hammer of the kinddescribed which may be quickly and accurately7 adjusted 'for various`uses, and which, although simple and of comparativelyV light weight,will consist of a minimum number oi' parts and will be eX- tremelydurable forhard usage. Many other objects and advantages of theconstruction herein shown and described will be obvious to those skilledin the art from the disclosures herein given. The present invention isin the nature of an improvement over the spring hammers shown in myUnited States 3o Letters Patent Numbers 1,006,873 and To this end myinvention consists in the novel construction, arrangement andcombination of parts herein shown and described,

85 and more particularly pointed out in the claims.

In the drawings, wherein like reference characters indicate like orcorresponding parts,

Fig. 1 is a view in elevation of my improved device;

Fig. 2 is a sectional. view taken substantially on line 2 2 of Fig. y1;

Fig. 3 is a sectional view taken substanlti'ally on line 3 3 of Fig, 2,enlarged toA more clearly showthe construction;

Fig. 4 is an enlarged sectional view taken substantially on line 4 4 ofFig. 2;

Fig. 5 is a sectional .view taken substantially on. line 5 5 .of Fig. 2;

Fig'. 6 is a view in elevation of the hammer removed from its barrel;and

Fig. 7 is a perspective view or' the stop member.

serial No. 247,855.

Referring to the drawings, 1 represents a suitable barrel of the desiredsize and shape, which is preferably slotted at 2 at one side. ArrangedWithin the barrel is a. hammer member 3 which is of a size to slide orreciprocate in the barrel as will be hereafter described. Arranged atone end of the barrel 1 is what may be termed a hammer block or chuck 4arranged to cooperate with the hammer 3 and receive the blow andtransmit it to the tool. The hammer block 4 is of a size to fit thebarrel, and in the construction shown has a slight sliding movementthere in. Itis maintained in place and prevented from being thrown outof the barrel by a key G arranged to envage therewith in the slot orgroove 5 see Figs. 2 and 4). The key is maintained in place by a collar7 and retaining bolt 8, or equivalent means for the purpose. The block 4is provided With a recess 9 which is preferably tapered, so as toreceive the tapered end 11 of the shank 10, at the end of which isarranged a suitabletool 12. In the construction shown I have illustrateda stone or concrete drill 12 mounted on the tapered end 13 of the shank10. The particular construction and kind of tool is immaterial in so faras the present invention is concerned. I have shown the tool 12removably mounted on the shank 10, it being understood that it may bemade integral therewith if desired. In the particularV tool illustratedI have shown the discharge opening 12 through which dust, chips, etc.,may drop out, preventing clogging of the tool.

`lhere desired the tool shank may project through the block 4 as shownin my prior patents mentioned, and in this case the recess 5 is of asize to fit the key 6, so that the block does not move, and the toolshanks re ceives the blow direct.`

Arranged within the barrel is a spring 16, one end of which is'arrangedto bear against the hammer 3, and the other a ainst a Ystop 17. I haveshown the stop 1g( secured in place by a bolt'19, the stop havingloneior more holes 18 therethrough. I prefer to provide a plurality ofholes 18, so that the stop or block 17 may be adjusted in the barrel soas to vary the effect of the spring 16, as will be more clearlyexplained in the operation of the device. I have shown a handle at theend of the barrel consisting of the sidec If desired the whole devicemay be supported from a rod 22 and cooperating parts, not shown,arranged to co-act with the spring 23. The spring 23 bearing against thecollar 23 at the handle end tends to maintain the tool in contact withthe work. This part of the mechanism is employed when ceiling work is tobe done, or at such times where a rest or stop for the mechanism 22, 23,etc. may be employed.

As most clearly shown in Figs. 2, 3 and 5, the hammer 3 is provided witha groove 25 having a shoulder 26 at one end. I prefer to form a similarshoulder at the opposite ond so that the part 3 may be reversed afteruse after the same has become worn. Arranged opposite the slot 2 is aratchet wheel 27 having the desired number of teeth 28 arranged tosuccessively cooperate with the shoulder 26 on the hammer 3, and movethe same in a direction to retract the spring, the same moving out ofengagement with the shoulder and permitting the spring to drive thehammer against the hammer block or chuck 4, or tool as the case may be.The ratchet Wheel 27 is mounted in a casing part 29, which is formedwith the parts 30 and secured together by bolts 31, or their equivalentsfor the purpose. I prefer to make the casing 29 in two parts as shown.While the bolts 3l lock the same in place, I prefer to provide positiveengaging means between the barrel and the casing, so that there will beno tendency for the casing to slip or slide on the barrel. Parts 30 areprovided with lugs 33 arranged to fit. in recesses or holes 32 in thebarrel. I prefer to provide a plurality of holes 32 so as to permit adjustinent of the casing on the barrel so as to vary the operation of thehammer, as will be hereafter described. I have shown the parts 30reinforced by the lugs 34 at the points where the lugs 33 projectinwardly. The casing parts 29 are provided with the extending portions35 so as to form a hub or bearing for the shaft 36 which carries theratchet 27. Bushings 37 are provided on the squared shaft 36 so that thesame is free to rotate and carry or drive the ratchet wheel. I haveshown each end of the shaft squared as at 38 and crank arms 39 mountedthereon, the same being provided with handles 40. The crank arms 39 aresecured in place by the bolts 4l, or equivalent means for the purpose.

In o eration. assuming that the device is assemblbd as shown andreferring particularly to Fig. 2, as the handles are turned to drive theratchet in the direction indicated by the arrow, the teeth willsuccessively engage with the shoulder 26 and move the hammer 3 towardthe handle 21, and thence release the same, the spring 16 driving thehammer back to strike the hammer block 4,

and this having a slight sliding movement, the force of the blow istransmitted through the shank 10 to the tool 12 regardless of the lengthof the shank 10. As soonY as the hammer is again retracted the hammerblock 4 again takes the position as shown in Fig. 2, ready for the nextblow. The tension of the spring may be varied by changing the positionof the block or stop 17. The length of the blow or travel of the hammer3 may be varied by moving the casing 29 and ratchet 27 toward or fromthe tool end of the barrel. This varies the stroke, making a shorter andlighter blow or a longer and heavier blow as the case may be. Byremoving the casing 29 and placing another ratchet thereon andreassembling the casing, on the barrel in adjusted position the blow mayalso be varied. The ratchet may be employed with a considerable numberof teeth so that the device will render short light blows, or the numberof teeth reduced so that fewer but heavier blows are struck. The devicein this Way is adjustable for practically any kind of work. It will beparticularly noted that there is no chance for dust, grit and dirt ofany kind to get into the barrel, causing wear or impairing the action ofthe device.

What I claim as new and desire to secure by Letters Patent is:-

1. A spring hammer comprisin a barrel having a slot in one side thereo achuck received in one end of the barrel, a block received in theopposite end of the barrel, a handle received on that end of the barrelcarrying the block, sihgle transversely extending means passing throughthe handle, barrel and block for securing the handle and block to thebarrel, a reciprocating member mounted in the barrel between the chuckand block, a coiled spring received in the barrel for normally holdingthe reciprocating member in engagement with the chuck` one end of thespring engaging the end of the reciprocating member and the opposite endengaging the block, and means extending through the slot in the barrelfor operating the reciprocating member against the tension of thespring.

2. A spring hammer comprising a barrel having a slot in one sidethereof, a chuck received in one end of the barrel, a block received inthe opposite end of the barrel, said block having transversely extendingintersecting openings, a handle received on that end of the barrelcarrying the block, single transversely extending means passing throughthe handle, barrel, and one of the openings in the block for securingthe handle and block to the barrel, a reciprocating member mounted inthe barrel between the chuck and block, a coiled spring received in thebarrel for normally holding the reciprocatng member in engagement withthe .In testimony whereof, I have hereunto chuck, one end of the springengaging the signed my name in the presence of two subend of thereciprocating member and the soribing Witnesses.

opposite end engaging the block, and means JOHN H. PHILLIPS. extendingthrough the slot in the barrel Witnesses:

for operating the reciprocating member ROY W. HILL,

against the tension of the spring. CHARLES I. COBB.

